Improvement in machines for boring hubs



J. L; ROBERTS & R. K. DAILY.

Improvement in Machine for Boring Hubs.

Patented April 9, 1872-.

R min arias 9 '(MFIIOI'O'ZITHUGRKFHIC [R N X HERD/Hit? PROCESS) UNITEDSTATES JOHN L. ROBERTS AND ROSWELL K. DAILY, OF WAVERLY, IOWA.

IMPROVEMENT IN MACHINES FOR BORINGHUBS.

Specification forming part of Letters Patent No. 125,616, dated April 9,1872.

To all whom it may concern.-

Be it known that we, JOHN L. ROBERTS and ROSWELL K. DAILY, of Waverly,in the county of Bremer and in the State of Iowa, have invented certainnew and useful Improvement in Machines for Setting Boxes in Wheel-Hubsand I do hereby declare that the following is a full, clear, and exactdescription thereof, referencebein g had to the accompanying drawingmaking a part of this specification, in which Figure 1 is a sideelevationof our device as applied to a hub. Fig. 2 is an end elevationof the same, and Fig. 3 is a central longitudinal section on line a w ofFig. 2.

Letters of like name and kind refer to like parts in each of thefigures.

The object of our invention is the produc tion of a-cheap and simpletool, by means of which small manufacturers are enabled to bore out theinterior of a hub for the reception of its box in such a manner as j tocause the exterior of the latter to exactly coincide with the interiorof said hub; and to this end said invention consists in the device as awhole, when its several parts are constructed and combined substantiallyas and for the purpose hereinafter shown.

In the annexed drawing, A and B vrepresent two rectangularbars of metal,the ends of which are bent inward in parallel lines and at a right angleto the central portion of said bars. Fitted around and sliding upon thecentral por' tion of each bar A and B are two arms, 0, which extendinward to a distance about equal to the length of the ends a and b andin lines parallel with the same. The inner ends of the slides areextended laterally, and are curved inward so as to conform to theaverage circle of the end of a wheel-hub. A screw, D,passing inwardthrough a threaded opening, provided within the end ofeach arm a and b,has its end swiveled within the inner end of the contiguous slide orclamp C, so as to enable the same to be pressed inward or drawn outwardupon or with relation to the bars A and B. Each of the bars A and B isprovided with a central opening for the reception of a boring-bar, E,the opening within the bar A being threaded so as to correspond toandreceive the threaded portion d of said boring- .bar, while the openingwithin the bar B is plain, and has a size but slightly larger than thediameter of said boringbar, so as to enable the same to move freelywithin said opening. As thus constructed, the frame is fitted to andsecured upon a hub, as shown in the drawing, the curved ends of theclamp being caused to embrace the ends of said hub against which theyare pressed by means of the setscrews, while the boring-bar is passedthrough the center of said hub, and rests within its bearin gs in theframe bars. A number of outters F, G, H, and I are secured to or uponthe boring-bar, and made radially adjustable, so as to conform in sweepto the intended size of the different portions of the bore of the hub,after which said bar is caused to revolve within its bearings, and beingdrawn forward by means of its threaded end, its cutters remove thesurplus material and enlarge the interior of said hub to the desiredsize. By causing the first cutter Fto roughly shape the opening, thesecond or long cutter G to smooth and finish the same, and the thirdcutter, H, to cut the recess for the large end of the box, the wholeoperation may be performed at one time, and in the most perfect manner.In order that the boring-bar may be quickly inserted within or removedfrom the threaded opening within the bar A, a portion, A, of said bar isremoved upon the line shown in Fig. 2, one of its ends hinged while theother is held in place by means of a screw, a. By withdrawing said screwthe hinged part A may be turned back so as to open or divide thethreaded opening and enable the boring-bar to be placed within. Suitablescales or subdivisions are provided on the outer side of each frame bar,by means of which-the sliding jaws can be readily adjusted to positionwith relation to the boringbar. If desired, a set-screw, 0, may beinserted within the end of each sliding jaw C, and caused to bear uponthe frame bar, so as to more securely confine said jaw in position whenadjusted thereto. I

The device thus constructed is simple, easily constructed, efiicient inoperation, and can be E provided with suitable cutters, when saidfurnished at so small a cost as to bring it withparts are constructedand combined substanin reach of ordinary meehanics. tially as and forthe purpose shown.

Having thus fully set forth the nature and JOHN L. ROBERTS. merits ofour invention, what we'claim as new ROSWELL K. DAILY.

v Thehereinbefore-described device asawhole, Witnesses: consisting ofthe frame bars A and B, the slid- W. W. BAILEY, ing jaws G, the screwsD, and the boring-bar H. S. HOOVER.

